Publication Search
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July 2009This report summarises changes in nuisance periphyton (algal) growth at National River Water Quality Network sites between 1990 and 2006. Read more -
May 2012This independent report prepared for the Ministry by NIWA lists the known possible activities in the EEZ and describes their likely risk to the environment. It also recommends how activities could be classified under the proposed regulatory framework. Read more -
June 2009The report is part of a series of three reports that strengthen the evidence base for a potential industry-led voluntary product stewardship scheme. Read more -
September 2010This study reports on the use, recycling and disposal to landfill in New Zealand of articles containing brominated diphenyl ether (BDE) flame retardants. Read more -
May 2019This report analyses environmental conditions that cause the growth of periphyton in streams and rivers. Read more -
June 2005This 2005 report looked at the information and tools needed to make smart decisions about the best future uses of our ocean. It assessed the range of information and decision-making tools available in 2005 and identified opportunities to improve requirements. Read more -
September 2019This draft NIWA report provides the first attempt to develop bottom-line thresholds for suspended and deposited sediment based on ecological responses for New Zealand rivers and streams. Read more -
May 2020This NIWA report summarises existing literature on the consequences of delaying reductions to nutrient inputs on rivers, estuaries and lakes. Read more -
April 2015One of two reports that assessed the options and implications of using the Macroinvertebrate Community Index (MCI) as an attribute in the National Policy Statement for Freshwater Management. It looked at identifying potential threshold values to define numeric attribute states for MCI. Read more -
December 2013An investigation into the feasibility of using freshwater fish predictive models in national state of the environment indicators. Read more -
November 2002A 2002 stocktake of New Zealand's oceans legislation, policies, and strategies - and the international conventions New Zealand is a party to. Read more -
May 2018Phormidium is a potentially toxic, mat-forming benthic cyanobacterium found in an increasing number of New Zealand rivers. This report outlines a study which investigated drivers of Phormidium blooms in New Zealand rivers to predict risk of blooms. Read more -
April 2019This report summarises analysis methods and outcomes for modelling New Zealand’s river water quality. Read more -
April 2019This report summarises analysis methods and outcomes for modelling New Zealand’s lake water quality. Read more -
May 2019This report develops a model predicting the reference state for stream macroinvertebrates across New Zealand. Read more -
May 2020A literature review of studies that jointly considered climate and freshwater policy in New Zealand. Read more -
September 2019This data report provides an annual data picture of brassica grown in New Zealand. Read more -
June 2010The report assesses how well Integrated catchment management is working in New Zealand for managing freshwater quality. Read more -
May 2019This report provides information to help interpret trends in water quality of New Zealand’s lakes and rivers. Read more -
July 2006This report examines options for using market-based instruments to maximise the value and sustainability of New Zealand’s marine resource. Read more -
July 2006This report investigates approaches for the allocation and subsequent reallocation of water in New Zealand, including situations of over-allocation. Read more -
May 2019This report presents and tests a macroinvertebrate metric for New Zealand streams and rivers that is sensitive to changes in flow. Read more -
May 1997The first report summarising information on waste in New Zealand, written for organisations and individuals with an interest in waste management. Read more -
April 2019This report summarises analysis methods and outcomes for modelling nitrate-nitrogen leaching from livestock in New Zealand, from 1990 to 2017. Read more -
October 2007The 2006/07 National Landfill Census report provides information on the state of play of landfill sites across New Zealand in 2006/07. Read more -
May 2020This report presents research conducted by Lincoln University on the willingness to pay for the various attributes associated with New Zealand’s green premium. Read more -
May 2019This report considers options for New Zealand to manage the effects of fluctuations in recycling material commodity prices on our resource recovery sector. Read more -
May 2020This Castalia report estimates the administrative costs imposed under the Action for healthy waterways package for New Zealand’s 16 regional councils. Read more -
May 2019This report presents and tests a range of macroinvertebrate metrics for New Zealand streams and rivers that are sensitive to changes in sediment and periphyton. Read more -
October 2019This NIWA consultant report provides analysis of state and trends in a number of water quality variables in urban rivers and streams in New Zealand. Read more -
May 2005This paper assesses kerbside organic waste collections, in New Zealand and overseas, and identifies matters for territorial authorities to consider before implementing a collection of this nature. Read more -
July 2015In 2014, the Ministry for the Environment commissioned KPMG to research economic barriers to tyre recycling in New Zealand. This report presents the findings of that research. Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. It produces neurotoxins called anatoxins and ingestion of cyanobacteria mats has caused numerous dog deaths. Read more -
March 2003The 2002 Landfill Review and Audit provides a picture of the risks associated with landfills in New Zealand by assessing relative risks on a consistent basis nationwide using the Landfill Rapid Screening System Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. Read more -
October 2013The Ministry for the Environment commissioned ACIL Allen Consulting to undertake a cost-benefit analysis of sorting options for e-waste plastics being recycled in New Zealand that potentially contain brominated flame retardants. Read more -
February 2017Sediment is an important contaminant in New Zealand freshwaters. This report presents the development of an analytical framework to empirically relate various key instream measures of sediment to catchment sediment loads. Read more -
May 2018The Managing Upstream project aims to help inform management decisions when establishing freshwater objectives under the Freshwater NPS and increase knowledge on the state of different estuary types in New Zealand. Read more -
May 2018The Managing Upstream project aims to help inform management decisions when establishing freshwater objectives under the Freshwater NPS and increase knowledge on the state of different estuary types in New Zealand. Read more -
May 2019This report commissioned by the National Resource Recovery Taskforce analyses the resource recovery sector in New Zealand and the impacts on recycling following fluctuations in recycling material commodity prices as markets changed. Read more -
August 2020This report provides recommendations on opportunities to standardise domestic kerbside collections of waste in New Zealand to increase consistency, reduce confusion for householders, improve material quality and reduce residual rubbish to landfill. Read more -
June 2006This report assesses the state of knowledge and consensus on the environmental and health impacts of post-consumer waste electronic and electrical equipment, within the context of New Zealand landfills and potential illegal dumping. Read more -
June 2016This report presents the findings of a review of continuous dissolved oxygen data in New Zealand including an assessment of observed dissolved oxygen concentrations in relation to the National Objectives Framework (point source) band thresholds. Read more -
May 2020This report presents the modelled results of the impact of the National Policy Statement for Freshwater Management (2017) and two variants of the Essential Freshwater package on New Zealand’s economy in 2030 and 2050. Read more -
May 2010This report is one of two prepared for the Ministry for the Environment by NIWA, which update national indicator data for river water quality in New Zealand and help provide the evidence base for policy and decision makers. Read more -
September 2009This report provides an update of results for indicators of groundwater quality in New Zealand. It summarises average water quality at almost 1000 monitoring sites over the period 1995-2008, as well as trends at the same sites within that period of time. Read more -
May 2018Phormidium is a potentially toxic, mat-forming benthic cyanobacterium found in an increasing number of New Zealand rivers. This report outlines a study which assessed Phormidium toxin levels in the Cardrona (Otago), Mataura (Southland) and Hutt (Wellington) Rivers in 2017. Read more -
December 2018Ministry for the Environment, in partnership with Bay of Plenty Regional Council, commissioned Perrin Ag Consultants Ltd and Manaaki Whenua Landcare Research to assess the farm/orchard-gate economic impact of applying a range of mitigation practices to reduce losses of nitrogen, phosphorus, E. coli and sediment. Read more -
February 2017This report has been produced to test potential consequences of setting freshwater objectives for hydro scheme operations. Modelling was undertaken of a selection of various scenarios involving an increase in minimum flows in selected rivers to assess the impact of draft proposals to amend the NPS Freshwater Management on the New Zealand electricity system. Read more